Ameasurement is considered ­ if it actually measures what it is intended to measure, according to the topic of the study.
reliable
sociological
valid
quantitative

The correct answer is C. Valid

Explanation:

In the scientific method, the term measurement refers to a scale, instrument or unit that is applied to an event or object to study it and prove a hypothesis. Additionally, measurements can be of different types as these are consider as quantitative if it deals with numerical information, as qualitative if they deal with patterns that are not expressed by numbers; as reliable if the results found with a measurement is replicable and verifiable and as valid in the case the measure directly addresses or measures the phenomenon, event or object that is being studied. Therefore, a measure that actually measures what it is intended to measure is considered as a valid measurement.

what's this it's not giving you what have to do.

the correct answer is the following is a list of inventions made in the medieval islamic world, especially during the "islamic golden age" (8th to 13th centuries),[1][2] as well as the late medieval period, especially in the emirate of granada and the ottoman empire.

science and technology in the islamic world adopted and preserved knowledge and technologies from contemporary and earlier civilizations, including persia, india, china, and greece-roman antiquity, while making a number of improvements and innovations.